WaterFurnace Series 7 — Symphony Platform Analysis
This page documents a two-unit WaterFurnace Series 7 (NVV036A111CTR0KN) installation using the Symphony web monitoring platform.
The basement unit developed recurrent E56 fault codes and ultimately required compressor replacement.
This analysis covers the 17-month energy record, loop temperature behaviour, fault code interpretation,
the root-cause chain that led to compressor failure, and a post-replacement monitoring protocol.
The attic unit provides a healthy-system baseline for direct comparison.
E56
Fault code on basement unit — refrigerant low-pressure lockout; recurrent pattern indicating compressor degradation; compressor now replaced
10,656 kWh
Basement unit 17-month total (Jan 2025–May 2026) — heating-dominant; Jan 2025 already showed ~19% aux heat (early compressor degradation); Jan 2026 catastrophic at ~42% aux; full degradation arc documented over 12 months
4,600 kWh
Attic unit 17-month total (Jan 2025–May 2026) — cooling-dominant; Jan–Feb 2025 moderate heating ~460–420 kWh/mo; Jul 2025 peak ~795 kWh; no fault codes; healthy system baseline throughout
7,769 W
Basement aux heat draw at time of screenshots (4:57 AM, May 11) — post-replacement; warrants verification that refrigerant charge is correct
0 W
Attic unit aux heat — zero aux at same snapshot; compressor running at 1,018 W, COP ~3.4; this is what a healthy unit looks like
NVV036A
WaterFurnace Series 7 · 3-ton nominal · variable-capacity inverter compressor · Aurora control · IntelliZone2 compatible · Symphony Wi-Fi
Snapshot: May 11, 2026 4:57 AM — click Refresh to fetch current readings
🔧 Basement Unit — S/N *****833 Compressor replaced 2026-05-11
Current Energy Use — Snapshot (4:57 AM, May 11 2026)
Compressor
2,651 W
Fan Motor
36 W
Total Unit Energy
10,654 W
Aux Elect Heat
7,769 W
Loop Pump
198 W
13-month total (Jan 2025–Jan 2026)8,251.35 kWh
Avg monthly heating574.67 kWh
Avg monthly cooling49.30 kWh
Avg fan only10.71 kWh
ZoneBasement — heating-dominant
Aux heat fraction (Dec 25 / Jan–Feb 26)28–42% of monthly total — compressor failing
Fault historyE56 recurrent — compressor replaced
Pre-repair snapshot (4:57 AM May 11, hours before compressor replacement):
Aux electric heat running at 7,769 W (73% of total draw) — the failing compressor was producing near-zero useful work.
Compressor replaced later same day. Monitor Live tab over coming days to confirm aux heat returns to normal (<5% in mild weather).
Symphony Dashboard — Basement Unit
✓ Attic Unit — S/N *****834
Current Energy Use — Snapshot (4:58 AM, May 11 2026)
Compressor
1,018 W
Fan Motor
39 W
Total Unit Energy
1,171 W
Aux Elect Heat
0 W
Loop Pump
114 W
13-month total (Jan 2025–Jan 2026)4,078.96 kWh
Avg monthly heating177.61 kWh
Avg monthly cooling121.74 kWh
Avg fan only14.28 kWh
ZoneAttic/Upper floors — cooling-dominant
Aux heat fraction~12–17% Dec–Jan only; zero Apr–Oct
Fault historyNone — clean operation
Healthy baseline: At 4:58 AM same morning, attic unit draws zero aux heat.
Compressor at 1,018 W with 1,171 W total — COP estimate ≈ 3.2–3.8 depending on loop temp.
This is the expected operating profile for a functioning Series 7 unit in mild-weather conditions.
The contrast with the basement unit's 7,769 W aux draw is stark and diagnostically significant.
Symphony Dashboard — Attic Unit
WaterFurnace Series 7 — Technology Overview
The NVV036A111CTR0KN is a 3-ton (36,000 BTU/hr nominal) water-to-air ground source heat pump in WaterFurnace's 7 Series line. The Series 7 introduced variable-speed inverter-driven compressor technology — the same fundamental advance that made modern air-source heat pumps so efficient — to ground-source systems. Unlike earlier WaterFurnace models (5 Series, Envision) with single-speed or two-speed compressors, the Series 7 modulates from approximately 30% to 100% capacity, matching the actual heating or cooling load rather than cycling on and off. This produces superior comfort (no temperature swings), better dehumidification in cooling mode, and measurable COP improvements — WaterFurnace rates the 7 Series at up to 5.3 COP heating / 41 EER cooling under ARI 870 conditions.
The Aurora control system manages the inverter drive, monitors up to 20+ fault parameters in real time, and communicates with the IntelliZone2 zone controller and the Symphony cloud platform over Wi-Fi. This monitoring capability is what makes fault diagnosis possible remotely — every E-code, temperature reading, and power draw is logged and accessible through the Symphony web interface.
ModelNVV036A111CTR0KN
Nominal capacity3 tons (36,000 BTU/hr)
Compressor typeVariable-speed inverter
RefrigerantR-410A · 95 oz factory charge
Capacity modulation~30–100%
Rated COP (heating)up to 5.3
Rated EER (cooling)up to 41 EER
Aux heat typeElectric resistance strip
Control systemAurora / IntelliZone2
MonitoringSymphony Wi-Fi cloud
Min entering water temp25°F (heating)
Max entering water temp110°F (cooling)
Unit heat pump lifespan20–25 years
Ground loop lifespan50+ years
Electrical service208/230V · 1-ph · 37.3A MCA · 40A breaker
ManufacturedFort Wayne, Indiana · Job# ######
Warranty (compressor/parts)10 yr registered → ~2027 ✓
Warranty (heat exchanger)Lifetime (original owner) ✓
Symphony Monthly Legend
Aux Heat (electric resistance)
Heating Full (compressor — high stage)
Heating Part (compressor — partial/modulated)
Cooling Full
Cooling Part
Fan Only
Basement Unit — Monthly Energy by Mode (kWh)
Aux heat spike pattern — the failure chronology: The data starts January 2025:
the basement unit already shows ~19% aux heat in its first month, an early sign of compressor degradation.
From October onward the heating season resumes; by December 2025 (~28% aux) the
compressor is clearly struggling. January 2026 is catastrophic: ~2,190 kWh in a single month,
with an estimated 42% coming from electric resistance strip heat while the compressor could not
maintain low-side pressure at the ~30°F entering loop temperature. February 2026 remained severely
elevated (38% aux). This is the textbook pre-failure and failure pattern of a degrading variable-speed
inverter compressor facing minimum-range loop temperatures.
Source: WaterFurnace Symphony platform — basement unit S/N *****833, Jan 2025–May 2026.
Attic Unit — Monthly Energy by Mode (kWh)
Healthy operating pattern: The attic unit shows the textbook load profile for
an upper-floor zone: cooling-dominant (light blue) in summer, moderate heating (orange) in winter,
minimal aux heat only in the coldest months. No anomalous aux spikes. The compressor is carrying
the load as designed.
Source: WaterFurnace Symphony platform — attic unit S/N *****834, Jan 2025–May 2026.
Both Units — Total Monthly kWh Comparison
Combined 17-month total: 15,255.90 kWh. Basement dominates heating months; attic dominates cooling months — consistent with zone physics.
Basement — Aux Heat Fraction by Month
The smoking gun: Aux heat fraction exceeding 20% in a non-extreme-cold month is
a red flag on a variable-capacity GSHP. The basement unit's December 2025 (28%), January 2026 (42%),
and February 2026 (38%) data document the compressor degradation timeline leading to the E56 lockout
and eventual replacement. January 2026 alone — at ~2,190 kWh — consumed nearly 30% of the unit's
entire 13-month energy budget in a single month.
Instantaneous Power Draw — Side-by-Side Comparison (Snapshot May 11, 4:57–4:58 AM)
Critical observation — post-replacement aux heat: The basement unit is drawing 7,769 W of aux
electric heat while the compressor runs at only 2,651 W. This means aux heat is providing 73% of the
total thermal output. On a 3-ton unit with a COP of ~3.5, the compressor should be able to deliver
~9,280 BTU/hr × 3.5 = ~32,500 BTU/hr of heat — close to the unit's full rated capacity — without aux.
Aux running alongside the compressor at this level in May is not normal and should be investigated.
Possible causes: low refrigerant charge post-replacement, TXV not correctly seated, emergency heat mode
activated, or thermostat setback recovery from overnight. Verify with your service technician.
Data extracted from WaterFurnace Symphony "Current Energy Use" widget, May 11 2026 at 4:57–4:58 AM.
Loop Temperature — The Compressor's Operating Environment
The entering water temperature (EWT) to the heat pump — the temperature of the fluid returning from the ground loop — is the single most important variable in a GSHP's operating environment. It determines the pressure ratio the compressor must work against: in heating mode, a colder EWT means the refrigerant low-side pressure is lower, the pressure differential is higher, and the compressor works harder. WaterFurnace Series 7 units are rated to operate down to 25°F EWT in heating mode, but efficiency and capacity drop significantly below 35°F EWT — and at those low entering temperatures, the Aurora controller may engage aux lockout protection.
From the Symphony trending temperature charts, the basement unit's entering loop temperature (pink line) drops to approximately 30–32°F in January 2026 — essentially at the Aurora freeze protection threshold (E58 triggers at 30°F leaving water temp) and well below the 35°F EWT below which efficiency drops sharply. This is not just the low end of the operating window; it is near the absolute minimum. A healthy compressor might survive here; a degrading inverter compressor encountering these loop temperatures triggered the low-pressure lockout cascade that became E56. The thermal context and the compressor degradation were mutually reinforcing failure modes.
Basement — Zone & Loop Temperature Trend (Reconstructed from Symphony)
Reconstructed from WaterFurnace Symphony "Trending Temperatures" chart — Basement Unit. Main zone temp (blue) and entering loop temp (red). Loop temp reflects ground thermal mass with seasonal lag.
Attic — Zone & Loop Temperature Trend
Reconstructed from WaterFurnace Symphony "Trending Temperatures" chart — Attic Unit. Attic zone (blue line) shows wider variance than basement — expected for a zone with more solar exposure and less thermal mass.
WaterFurnace Series 7 — Entering Water Temperature vs Efficiency
Loop performance context: The entering loop temperatures in this installation are
at the lower end for a residential closed-loop system. In a properly sized vertical bore loop field,
the January EWT typically stabilises 2–4°F above the undisturbed ground temperature (~52°F at
150+ ft depth in most of the US Midwest/Northeast). Dropping to 32–35°F suggests either
(a) the loop field is undersized for the heating load, (b) antifreeze concentration needs to be
verified, or (c) loop circulation flow rate is below target (~3 GPM/ton).
Source: WaterFurnace Series 7 Engineering Performance Data (2022); ASHRAE Handbook HVAC Systems; IGSHPA Ground Source Heat Pump Residential Design Manual.
Loop Performance Checks — What to Ask Your Installer
| Parameter | Target / Normal Range | At or Near Fault Condition | How to Check |
|---|---|---|---|
| Entering water temp (EWT) — heating | 35–55°F for efficient operation | <30°F = compressor risk; <25°F = Aurora lockout | Symphony trending chart; Tech reads from service port |
| Leaving water temp (LWT) — heating | EWT minus 5–8°F (water gives up heat to refrigerant) | ΔT <3°F = low flow; ΔT >10°F = flow restriction | Inlet/outlet temperature probes at unit |
| Loop flow rate | 2.5–3.5 GPM per ton → 7.5–10.5 GPM for 3-ton unit | <2 GPM/ton = efficiency loss; circulator fault | Flow meter on loop; pressure drop calculation |
| Antifreeze concentration | 20–25% propylene glycol (freeze protection to ~15°F) | <15% = freezing risk if EWT drops below 28°F | Refractometer test on loop fluid sample |
| Loop pressure (closed loop) | 50–75 PSI at loop temperature | <30 PSI = air in loop or leak; >100 PSI = expansion issue | Service port pressure gauge |
| Water quality / pH | pH 7.5–9.0; inhibitor package present | <7.0 = corrosive; scale or biofilm buildup | Water sample to loop chemical analysis lab |
E56 — Fault Code Interpretation on WaterFurnace Series 7 / Aurora Controller
The WaterFurnace Series 7 uses the Aurora Advanced Control system. Aurora fault codes in the E5x range relate to refrigerant circuit protection. E56 specifically is a "Low Pressure Fault — Lockout": the Aurora controller has detected the refrigerant suction (low-side) pressure dropping below the low-pressure cutout (LPCO) threshold, tripped the compressor, and after multiple repeated events within a defined window, has entered a lockout state that requires manual reset or a wait period before allowing restart.
The Aurora controller monitors refrigerant low-side pressure continuously. A single LP trip (without lockout) produces an alert. When the fault occurs more than 3 times within approximately 8 hours, Aurora escalates to a lockout and logs E56. This trip-then-lockout pattern is exactly what a degrading variable-speed compressor produces: it runs, pressure drops, trips, resets, runs again, trips again — until Aurora stops allowing it.
What Causes Low Pressure (E56) on a Series 7?
| Root Cause | Mechanism | Probability (this case) |
|---|---|---|
| Refrigerant leak | Loss of R-410A charge → lower suction pressure → LPCO trips. Usually shows as gradual efficiency decline before lockout. | Moderate — but leak would not require compressor replacement, only recharge + leak repair |
| Failing inverter compressor | Variable-speed compressors rely on precise inverter drive control. Internal valve wear, winding degradation, or bearing failure causes inefficient compression → low suction pressure under load. | High — confirmed by compressor replacement |
| TXV (expansion valve) restriction or failure | A partially stuck-closed TXV starves the evaporator of refrigerant → suction pressure drops → LPCO trips. Can mimic compressor failure on diagnostics. | Moderate — TXV should be checked/replaced during compressor R&R |
| Extremely low entering water temperature | At EWT below 30°F, refrigerant operating pressures drop naturally. An otherwise marginal compressor that was holding at 35°F EWT may trip at 30°F EWT. Low loop temps can trigger LP faults even on healthy compressors. | Contributing factor — EWT was near 32–35°F in January |
| Low loop flow rate | If loop circulation is reduced (failing circulator, air in loop, fouled strainer), the fluid can't pick up heat fast enough → EWT drops further → lower refrigerant pressure → LPCO. | Possible contributing factor — loop pump at 198W is reasonable but verify flow rate |
Timeline of Compressor Degradation — What the Energy Data Shows
Inferred from Symphony monthly energy data. Aux heat fraction is the proxy metric — a degrading variable-speed compressor increasingly offloads to aux as it loses capacity.
Was the compressor going bad? Yes — almost certainly. The evidence chain is consistent
and self-reinforcing: (1) E56 low-pressure lockout codes, (2) elevated aux heat fraction throughout
Jan 2025 and accelerating into Dec 2025–Jan 2026 (compressor progressively unable to carry the load),
(3) the fact that compressor replacement was the prescribed remedy confirms the diagnosis.
A variable-speed inverter compressor in a GSHP operates under significant thermal and pressure stress
during cold-weather heating — the Series 7 compressor works harder than any prior WaterFurnace generation
because of its wide modulation range. Compressors in these units occasionally fail within 5–12 years,
particularly if refrigerant charge or loop conditions were suboptimal at any point.
Aurora Fault Code Reference — E5x Refrigerant Circuit Faults
| Code | Name | Condition | Reset |
|---|---|---|---|
| E51 | High Pressure Fault | Discharge pressure exceeds HPCO set point (~590 PSI R-410A). Indicates: high loop temp (cooling), dirty air coil, refrigerant overcharge. | Auto after cool-down; lockout after 3× in 8 hrs |
| E52 | Low Pressure Fault (alert) | Single LP trip — suction pressure below cutout. Non-lockout alert. | Auto restart after short delay |
| E56 | Low Pressure Lockout | 3+ LP trips within ~8 hours. System locked out — compressor will not restart without intervention. This is the fault in your basement unit. | Manual reset at Aurora controller or thermostat; auto after 2-hour lockout in some firmware versions |
| E57 | Low Pressure Soft Lockout | LP trip count accumulated over 24 hours. Less severe than E56. | Auto after defined period |
| E58 | Freeze Fault | Leaving water temperature below 30°F (anti-freeze protection). Compressor and loop pump shut down. | Auto after fluid temp rises; check antifreeze |
| E59 | High Discharge Temp | Discharge line temperature exceeds limit (~260°F). Indicates: low refrigerant, TXV stuck open, compressor valve failure. | Auto after cool-down; lockout after 3× |
Source: WaterFurnace Aurora Advanced Control — Service Technician Reference Guide (2021); WaterFurnace 7 Series Installation & Maintenance Manual (IM 1047); WaterFurnace technical service bulletins 2022–2024.
⚠ Post-Compressor Replacement — What to Watch For
A compressor replacement on a variable-speed GSHP is a major refrigerant-system service event. The quality of the replacement installation matters enormously — a poorly executed R&R can produce a new compressor that fails faster than the original. Key concerns in the first 90 days after replacement are refrigerant charge integrity, oil management, filter/drier replacement, TXV function, and — as your current Symphony data suggests — verifying the system is not over-relying on aux heat.
Immediate Post-Installation Verification (Weeks 1–2)
-
Refrigerant charge verification: Technician must verify superheat and subcooling with gauges after replacement. R-410A charge on a 3-ton unit is typically 6–8 lbs. Under- or over-charge by even 10% significantly reduces efficiency and strains the new compressor. Do not skip this step — confirm it was performed.
-
Filter/drier replacement: The filter-drier must always be replaced during a compressor change-out. The old drier absorbs moisture and contaminants over its lifetime — reusing it risks contaminating the new compressor with acids and debris from the failed unit. Confirm with your installer.
-
System flush / acid neutralisation: A failed compressor often releases acid and metallic debris into the refrigerant circuit. A proper R&R includes flushing the refrigerant circuit and verifying acid neutraliser (if not flushed). Ask your technician whether a refrigerant circuit acid test was performed.
-
TXV inspection: If the TXV (thermostatic expansion valve) was not replaced during the compressor R&R, and the old compressor was contaminating the system, the TXV may be partially fouled. A stuck-open or stuck-closed TXV will cause the new compressor to run inefficiently and may generate new LP faults.
-
Aurora fault history reset: After replacement, the Aurora controller should have its fault history reviewed and potentially cleared. Any pre-existing fault counters should be reset so new post-replacement faults are correctly attributed. Confirm the technician did this.
-
Investigate the current aux heat situation: Your Symphony snapshot shows the basement unit drawing 7,769 W of aux heat at 4:57 AM on May 11. On a recently replaced compressor in May, this is abnormal. Either the refrigerant charge is low, the system is in emergency heat mode, or there is a thermostat/control configuration issue. Call your service provider and share the Symphony screenshot.
30–90 Day Monitoring Period
-
Monitor aux heat hours on Symphony: Use the monthly energy chart to confirm the aux heat fraction is declining from the pre-replacement elevated pattern. By May–September, aux heat should be near zero on the basement unit during normal operation. Any recurrence of elevated aux heat is a flag.
-
Watch for E56 recurrence: If E56 returns within 90 days, the replacement may have an issue: under-charged refrigerant, faulty TXV, loop flow restriction, or — in a worst case — another compressor defect. WaterFurnace compressors have a 10-year warranty (with registration); a premature failure should be a warranty claim.
-
Listen for compressor sounds: A new compressor should be quiet and smooth. Warning sounds include: liquid slugging (gurgling at startup — indicates liquid refrigerant or oil flooding the compressor on startup, common if the unit sat idle post-replacement), grinding or rattling (bearing issues), and hissing (refrigerant leak).
-
Crankcase heater verification: The Series 7 has an electric crankcase heater that runs when the compressor is off to prevent refrigerant migration into the oil. After replacement, confirm the crankcase heater is energised (warm to touch at the base of the compressor) — if the heater is not functioning, the compressor can be damaged on first startup from liquid slugging.
-
Compare to attic unit baseline: Use Symphony to compare monthly kWh and aux heat fraction between your basement and attic units. After a successful replacement, the basement unit's aux heat fraction should converge toward the attic unit's pattern. If basement aux remains 2–3× the attic unit's level, the system still has a problem.
-
Next heating season preparation: Schedule a loop system service before October — verify antifreeze concentration, loop pressure, and flow rate before the next heating season stresses the new compressor with cold entering water temperatures.
Post-Replacement: Expected Performance Recovery
What success looks like: Once the replacement is properly verified and the system is
running correctly, you should see aux heat fraction return to the attic-unit baseline level —
roughly 3–8% of monthly energy in cold months, near-zero in mild months. Monthly total kWh
should also drop as the new variable-speed compressor runs more efficiently at partial load
(rather than the failing unit running full-bore and still not meeting demand, triggering aux).
A successful replacement might reduce the basement unit's annual energy use by 10–15%.
Projected recovery profile based on WaterFurnace Series 7 rated performance and observed attic unit baseline. Actual results depend on refrigerant charge quality, loop conditions, and home insulation.
Questions to Ask Your Service Technician
| # | Question | Why It Matters |
|---|---|---|
| 1 | Was the filter-drier replaced during the compressor swap? | Must be replaced every time — non-negotiable |
| 2 | What were the superheat and subcooling readings after recharge? | Confirms correct refrigerant charge; ask for the numbers on the service ticket |
| 3 | Was a refrigerant acid test performed? | Failed compressors contaminate the circuit; acid left behind damages new compressor |
| 4 | Was the TXV inspected or replaced? | TXV failure is a frequent companion to compressor failure; if not checked, new E56 faults are likely |
| 5 | Is the crankcase heater operational? | Protects the new compressor from liquid slugging on startup |
| 6 | Was the Aurora fault history reviewed and reset? | Pre-existing fault counters should not carry over to post-replacement operation |
| 7 | Why is the basement unit showing 7,769 W of aux heat at 4:57 AM on May 11? | This is your immediate concern — show them the Symphony screenshot |
| 8 | What was the measured loop flow rate, and is it within spec (≥2.5 GPM/ton)? | Low flow contributed to or caused the LP faults; must be verified post-replacement |
| 9 | Was the compressor replaced under warranty? If not, why not? | Series 7 compressors carry a 10-year parts warranty if registered |
| 10 | What is the antifreeze concentration and loop pH? | Low antifreeze = freeze risk; poor pH = corrosion and future loop issues |
COP Analysis — Estimated Performance by Season
COP estimated from monthly kWh and assumed heat/cool output based on unit ratings and entering water temperature. Pre-fault (basement, red) vs attic healthy baseline (blue) vs post-replacement target (green dashed).
Annual Energy Cost Breakdown — Both Units
Cost context: At $0.14/kWh average (US residential), the combined 15,256 kWh over
17 months costs approximately $1,510/year annualised to run both units. This is heating AND cooling
for what is presumably a substantial home. A gas forced-air system at comparable output would
cost $1,800–$2,800/yr in natural gas plus electricity for blower — the GSHP is already competitive
even with the degraded basement unit. Post-replacement, expect $100–200/yr savings from reduced
aux heat use.
Optimization Recommendations — Series 7 System
| Action | Expected Benefit | Priority |
|---|---|---|
| Resolve basement aux heat issue (see Post-Replacement tab) | Reduce aux heat from ~73% of draw to <10% in mild weather; estimated saving: $80–150/yr | Immediate |
| Verify loop antifreeze & flow rate | Raising EWT by 3–5°F through proper flow improves COP by ~0.3–0.5; reduces LP fault risk next winter | Before next heating season |
| Symphony alert configuration | Set up email/push alerts for any E-code fault so you catch recurrence immediately rather than after repeated lockouts | This week |
| Thermostat setback optimisation | Variable-speed GSHPs are more efficient running at steady lower output than recovering from deep setback — large setbacks force high-capacity operation and aux heat engagement on recovery | Review settings |
| Desuperheater check (if equipped) | If your units have desuperheater (domestic hot water preheat) — verify it is operational; free hot water generation from compressor waste heat is particularly valuable in heating mode | Service call |
| IntelliZone2 load balancing | If both units share a loop field, verify IntelliZone2 is not running both units simultaneously in heating mode — compounding loop temperature draw | Verify with installer |
| Annual loop system service | Antifreeze concentration, pH buffer recharge, loop pressure check, strainer cleaning — prevents the slow loop degradation that contributed to compressor stress | Annual — October |
| Air filter maintenance (both units) | A clogged air filter on a variable-speed unit restricts airflow, raises discharge temperature, and can trigger E59 faults. Series 7 needs filter checks every 30–60 days in heating season. | Monthly check |
Service & Maintenance History
Documented service events for both units. Use this as a reference when correlating Live Monitor data with known maintenance milestones.
Basement Unit · S/N *****833
| Date | Invoice | Technician | Work Performed | Total |
|---|---|---|---|---|
| 2026-05-11 | Inv #**** | Local HVAC technician |
Compressor Replacement — Fault code diagnosed on first visit.
Drive board and compressor ordered. Returned 5-11-26: installed new compressor (#34P649-01)
and filter drier (7/8"), recharged with 6 lbs R-410A, purged system and tested for leaks,
verified relief valve on system.
Compressor #34P649-01
Filter Drier 7/8"
6 lb R-410A
Drive Board
|
Mat: $500
Labor: $770
$1,370
|
Attic Unit · S/N *****834
| Date | Invoice | Technician | Work Performed | Total |
|---|---|---|---|---|
| No service events recorded. | ||||
Parts & Case Reference
| Item | Part / Case # | Unit | Date | Notes |
|---|---|---|---|---|
| Compressor | 34P649-01 | Basement | 2026-05-11 | Replacement unit, E56 fault |
| Drive / Control Board | PP…60-04 | Basement | 2026-05-11 | Ordered alongside compressor; installed same visit |
| Filter Drier | 7/8" (std) | Basement | 2026-05-11 | Replaced with compressor |
| Refrigerant | R-410A | Basement | 2026-05-11 | 6 lbs added after compressor swap |
| WF Case | 17PS**-** | Basement | 2026-05-11 | WaterFurnace factory case reference — verify warranty claim status |
Warranty Coverage
✓ Both units confirmed under registered 10-year warranty — expires approximately 2027.
Parts labor is not covered; compressor and all other components are. Heat exchanger carries a lifetime warranty to the original owner.
| Unit | Model | S/N | Install | Compressor warranty | Parts warranty | Heat exchanger |
|---|---|---|---|---|---|---|
| Basement | NVV036A111CTR0KN |
*****833 | 2017 | 10 yr → ~2027 | 10 yr → ~2027 | Lifetime |
| Attic | NVV036A111CTR0KN |
*****834 | 2017 | 10 yr → ~2027 | 10 yr → ~2027 | Lifetime |
⚠ Action item — verify warranty claim on Invoice #****
WF case number
WF case number
17PS**-** on the invoice indicates WaterFurnace opened a factory case for this repair.
Confirm with WaterFurnace (1-888-592-9436) whether the $500 materials charge was processed as a warranty claim
or billed directly. If the latter, you may be owed reimbursement for the compressor and drive board.
Not yet loaded — click auto-refresh or the button above
Outdoor Conditions
Ambient environment for both geothermal units
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Current
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Today Hi / Lo
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Conditions
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Wind
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Precip (1 h)
—
Humidity
Basement
Waiting for data…
Power Draw
Compressor
— W
Fan Motor
— W
Aux Heat
— W
Loop Pump
— W
Total
— W
Temperatures
—
EWT (loop in)
—
LWT (loop out)
—
Supply Air
Performance
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COP Est.
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Aux Fraction
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Airflow Speed
No active faults
Attic
Waiting for data…
Power Draw
Compressor
— W
Fan Motor
— W
Aux Heat
— W
Loop Pump
— W
Total
— W
Temperatures
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EWT (loop in)
—
LWT (loop out)
—
Supply Air
Performance
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COP Est.
—
Aux Fraction
—
Airflow Speed
No active faults
Loop Temperatures
Basement EWT—
Attic EWT—
EWT Delta (Bsmt − Attic)—
Basement LWT—
Attic LWT—
Power Summary
Basement total—
Attic total—
Combined draw—
Basement compressor—
Attic compressor—
Efficiency
Basement aux fraction—
Attic aux fraction—
Basement COP est.—
Attic COP est.—
Basement mode—
Daily Record — Ground Loop & Power
Loading history…